1 /* 2 * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/gsb_crc32.h> 31 32 #include <stdint.h> 33 34 #include <atf-c.h> 35 36 #if defined(__amd64__) || defined(__i386__) 37 #include <machine/cpufunc.h> 38 #include <machine/specialreg.h> 39 40 static bool 41 have_sse42(void) 42 { 43 u_int cpu_registers[4]; 44 45 do_cpuid(1, cpu_registers); 46 47 return ((cpu_registers[2] & CPUID2_SSE42) != 0); 48 } 49 #endif 50 51 static void 52 check_crc32c(uint32_t expected, uint32_t crc32c, const void *buffer, 53 size_t length) 54 { 55 uint32_t act; 56 57 #if defined(__amd64__) || defined(__i386__) 58 if (have_sse42()) { 59 act = sse42_crc32c(crc32c, buffer, length); 60 ATF_CHECK_EQ_MSG(expected, act, 61 "sse42_crc32c expected 0x%08x, got 0x%08x", expected, act); 62 } 63 #elif defined(__aarch64__) 64 act = armv8_crc32c(crc32c, buffer, length); 65 ATF_CHECK_EQ_MSG(expected, act, 66 "armv8_crc32c expected 0x%08x, got 0x%08x", expected, act); 67 #endif 68 act = singletable_crc32c(crc32c, buffer, length); 69 ATF_CHECK_EQ_MSG(expected, act, 70 "singletable_crc32c expected 0x%08x, got 0x%08x", expected, act); 71 act = multitable_crc32c(crc32c, buffer, length); 72 ATF_CHECK_EQ_MSG(expected, act, 73 "multitable_crc32c expected 0x%08x, got 0x%08x", expected, act); 74 } 75 76 ATF_TC_WITHOUT_HEAD(crc32c_basic_correctness); 77 ATF_TC_BODY(crc32c_basic_correctness, tc) 78 { 79 const uint64_t inputs[] = { 80 0xf408c634b3a9142, 81 0x80539e8c7c352e2b, 82 0x62e9121db6e4d649, 83 0x899345850ed0a286, 84 0x2302df11b4a43b15, 85 0xe943de7b3d35d70, 86 0xdf1ff2bf41abf56b, 87 0x9bc138abae315de2, 88 0x31cc82e56234f0ff, 89 0xce63c0cd6988e847, 90 0x3e42f6b78ee352fa, 91 0xfa4085436078cfa6, 92 0x53349558bf670a4b, 93 0x2714e10e7d722c61, 94 0xc0d3261addfc6908, 95 0xd1567c3181d3a1bf, 96 }; 97 const uint32_t results[] = { 98 0x2ce33ede, 99 0xc49cc573, 100 0xb8683c96, 101 0x6918660d, 102 0xa904e522, 103 0x52dbc42c, 104 0x98863c22, 105 0x894d5d2c, 106 0xb003745d, 107 0xfc496dbd, 108 0x97d2fbb5, 109 0x3c062ef1, 110 0xcc2eff18, 111 0x6a9b09f6, 112 0x420242c1, 113 0xfd562dc3, 114 }; 115 size_t i; 116 117 ATF_REQUIRE(nitems(inputs) == nitems(results)); 118 119 for (i = 0; i < nitems(inputs); i++) { 120 check_crc32c(results[i], ~0u, &inputs[i], sizeof(inputs[0])); 121 } 122 } 123 124 ATF_TC_WITHOUT_HEAD(crc32c_alignment); 125 ATF_TC_BODY(crc32c_alignment, tc) 126 { 127 const uint64_t input = 0xf408c634b3a9142; 128 const uint32_t result = 0x2ce33ede; 129 unsigned char buf[15]; 130 size_t i; 131 132 for (i = 1; i < 8; i++) { 133 memcpy(&buf[i], &input, sizeof(input)); 134 check_crc32c(result, ~0u, &buf[i], sizeof(input)); 135 } 136 } 137 138 ATF_TC_WITHOUT_HEAD(crc32c_trailing_bytes); 139 ATF_TC_BODY(crc32c_trailing_bytes, tc) 140 { 141 const unsigned char input[] = { 142 0x87, 0x54, 0x74, 0xd2, 0xb, 0x9b, 0xdd, 0xf6, 0x68, 0x37, 143 0xd4, 0x4, 0x5e, 0xa9, 0xb3 144 }; 145 const uint32_t result = 0xec638d62; 146 147 check_crc32c(result, ~0u, input, sizeof(input)); 148 } 149 150 ATF_TP_ADD_TCS(tp) 151 { 152 153 ATF_TP_ADD_TC(tp, crc32c_basic_correctness); 154 ATF_TP_ADD_TC(tp, crc32c_alignment); 155 ATF_TP_ADD_TC(tp, crc32c_trailing_bytes); 156 return (atf_no_error()); 157 } 158